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  1. Hive
  2. HIVE-5632

Eliminate splits based on SARGs using stripe statistics in ORC

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 0.13.0
    • 0.13.0
    • None

    Description

      HIVE-5562 provides stripe level statistics in ORC. Stripe level statistics combined with predicate pushdown in ORC (HIVE-4246) can be used to eliminate the stripes (thereby splits) that doesn't satisfy the predicate condition. This can greatly reduce unnecessary reads.

      Attachments

        1. orc_split_elim.orc
          241 kB
          Prasanth Jayachandran
        2. HIVE-5632.5.patch.txt
          39 kB
          Prasanth Jayachandran
        3. HIVE-5632.5.patch
          39 kB
          Gunther Hagleitner
        4. HIVE-5632.4.patch
          39 kB
          Gunther Hagleitner
        5. HIVE-5632.3.patch.txt
          39 kB
          Prasanth Jayachandran
        6. HIVE-5632.2.patch.txt
          37 kB
          Prasanth Jayachandran
        7. HIVE-5632.1.patch.txt
          7 kB
          Prasanth Jayachandran

        Issue Links

          is blocked by

          New Feature - A new feature of the product, which has yet to be developed. HIVE-5562 Provide stripe level column statistics in ORC

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              prasanth_j Prasanth Jayachandran
              prasanth_j Prasanth Jayachandran
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              Dates

                Created:
                Updated:
                Resolved: